was trying to get more info about this error.
imx6q manual says "not receive a valid response from the device (Timeout, CRC, Bad PID, etc.)."
What would be "etc", and how to determine the exact error in the above list ?
I am getting this error on storage media communication at 12Mbit in u-boot, after several retries, an error is returned. While Linux then can mount the media properly.